The APSM (Advanced Porous Silicon Membrane) process digital composite sensor, identified as BME280 , is designed to measure ambient temperature, humidity, and atmospheric pressure with low power consumption.
It is compatible with the BMP280 and follows the same operational principles as the barometric temperature register control and data readout. The humidity-sensitive element offers fast wake-up and response times, high accuracy, and a wide temperature operating range.
The barometric pressure-sensitive element is characterized by low noise, high precision, and high resolution for absolute atmospheric pressure sensing. The temperature sensing components are known for their low-noise, high-resolution characteristics, and they enable temperature-compensated self-correction for humidity and barometric pressure values.
The humidity sensing element and barometric pressure sensitive element can be independently enabled or disabled through the configuration of the sampling rate register. This sensor is suitable for use in space-limited mobile devices such as smartphones, tablets, smartwatches, and wearable devices. Additionally, it finds applications in weather forecasting, vertical speed indication, flight control devices, indoor and outdoor navigation, and smart home devices.
Product Parameter
Operating Voltage: BME280(1.7~3.6V DC) BMP280(5V DC)
Temperature measurement range: 0°C~65°C
Temperature Measurement Error: ±0.5° CMAX s.1°C.
Resolution: 0.1°C
Relative Humidity Measurement Range: 0%~100
Humidity response time: greater than 1s
Relative Humidity Measurement Error: ±2%
Humidity hysteresis: ±1%
Resolution: 0.8%
Barometric Pressure Measurement Range: 300~1100hPa(Hundred Pascals)
Barometric pressure measurement error: ±1hPa resolution 0.18Pa
Digital interface type: IIC (3.4MHz slave mode) or SPI (3-wire or 4-wire slave mode 10MHz)
Dimension: 15.4mm(L)*11.6mm(W)*2.4mm(H)
With M3 fixing screw holes for easy installation and fixing.
Pin Description
VCC: Power Positive
GND: Ground
SCL: 12C/SPI serial clock line
SDA: I2C serial data line
3-wire SPI serial data input/output ports
4-wire SPI serial data input port
CSB: Chip select pin, high level (default) for IIC communication interface, low level for SPI communication interface.
SDO: I2C address select bit 4-wire SPI serial output port
Instruction for use
Module in 12C mode through the SDO pin to determine the device address, SDO connected to GND low-level slave address 1110110 (0x76), the module default 0x76; connected to high-level slave address 1110111 (0x77)